Pipe sleeve



4 m1 #7 m.//N////////// F. DE GARAY PIPE SLEEVE Filed Mrrch 24, 1928 June 10, 1930.

I mu M4101 ATTORNEY Jay's: S H! Patented June 10, 1950 I UNITED STATES PATENT OFFICE FRANCIS DE GARAY, OF BROOKLYN, NEW YORK, ASSIGNOR '10 ALTMAR STEEL BROD- UCTS OOMPANY,'INC., OF NEW YORK, N. Y., A'CQBPORA'IION OF NEW YORK PIPE SLEEVE Applicationflled March 24, 1928. Serial No. 264,554.

My invention relates to metallic pipe sleeves of the kind usedfor connecting together a number of separate pipe sections, in order to form a continuous pipe of=considerable length. Pipes of this general type and thus built up are adapted for use as concrete piles, supporting posts and the like, and especially inthe preparation of foundation work to support large buildings, heavy bridge heads, boat piers and the like.

It is common practice in, this art to form piles of considerable length by driving a pipe section into the ground, then connecting to the top of this pipe section another pipe section, and driving that pipe section down so as to push the first mentioned pipe section below it, then connecting a third pipe section to extend upwardly from the top of the second pipe section; and thus to form, section by section, a continuous pipe extending deep into the ground. By doing this a finished pipe may be extended deep into the ground; sometimes, though not always, reaching or extending into bed rock. I

This done, any dirt or water within the pipe is removed therefrom by discharging into the pipe a suitable quantityof air under high pressure. Finally, the' pipe being finished andempty, it is filled with concrete material in plastic form, which is thereafter allowed to set and harden. The result is a so-called concrete pile, having great strength. The finished pile is finally tested as regards its strength and the firmness of its footing.

My invention relates to a pipe sleeve or coupling used for connecting any given pipe section with the next successive pipe section; my purpose being to give the pipe sleeve such form that the finished pipe, containing a number of my improved pipe sleeves, is not only water tight, but unusually strong, durable and firm as compared with pipes of the prior art used for similar pur ose's.

The pipe formedby aid 0 my improved pipe sleeve may be forced down into the ground in either of two ways, namely by ]acking or by driving; but it is especially adapted for driving; and by driving, I mean forcing the pipe downwardly by the blows of sleeve, showing it as used to connect together two consecutive pipe sections.

Figure 2 is a fragmentary vertical section, similar to the left hand portion of Figure 1, but upon a larger scale.

Figure 3 is a section somewhat similar to Figure 2, but showing the pipe as made up with another form of my invention.

Figure 4 is a vertical section, also similar to Figure 2, but showing another form of my improved pipe sleeve.

Figure 5 is a perspective of the form of my pipe sleeve shown in Figures 1 and 2.

Pipe sections are shown at 6, 7, and are adapted to be connected by aid of a pipe sleeve.

In the form of my pipe sleeve shown in Figures 1, 2 and 5 there is an outer band 8, and a connecting portion 9 of annular form. Extending in opposite directions from the connecting portions 9 is an upper portion 10 and a lower portion 11, together constituting an inner band. Thus the pipe sleeve may be considered as a pair of bands one concentric to the other, and connected together by the connecting portion 9 and integral therewith, as may be understood from Figure 2.

The outer band 8 is provided adjacent its upper. and lower edges, with roundedsurfaces 16, 17 v The purpose of the bull noses 12, 13, 14 and 15 is to guide the pipe sections 6 and 7-relatively to each other and to the pipe sleeve.

The upper surface 18 of the connecting portion 9 is slightly concave, and this is also true of the lower surface-19 of this connecting portion.

The lower end 20 of the pipe section 6 and the upper end 21 of the pipe section 7 are adapted to become convex or rounded, as indicated in Figure 2, so as to fit snugly against and bind hard upon the adjacent surfaces 18 and 19 of the connecting portion 9.

The pipe sections 6 and 7 are not always quite smooth and free from blemishes. Very pften the ends of the pipe sections are more or less ragged, and provided with extending portions of irregular form, usually more or less fin-like. A

When, however, the pipe section and pi e sleeve are fitted together and the pipe s bjected to the driving action of a power hammer, the ends of the pipe section are forced into position within the pipe sleeve, so as to form a oint which is water tight and by aid of which the pipe as a whole is rendered very strong.

In practice the pipe section 7 is first driven into the ground, next the pipe sleeve is placed upon thetop of this pipe section, and then the pipe section 6 is lowered and fitted to the pipe sleeve, all as indicated in Figure 1. As the pipe section 6 is forced downwardly, its lower end 20 is driven hard against the upper surface 18- of the connecting portion 9, and the lower surface 19 of this connecting portion is likewise driven hard against the upper end 21 of the pipe section 7.

The momentary pressure due to the stroke of the power hammer tends to render the lower end 20 and the upper end 21 of the pipe section a little convex or rounded, and to swage or spread these ends to a slight degree. The result is that the ends of the pipe sections are not only fitted tightly in position within the pipe sleeves, but are changed slightly in form, so that the fit is rendered perfect, almost as if the parts were welded together or otherwise made practically integral.

It will be noted that the bull noses: 12, 13,

14 and 15 are so located and arranged as to effectively guide the pipe sections. Not only that, but these bull noses because of their form have a marked tendency to correct slight irregularities of the end surfaces of the pipe sections. For instance if one of the pipe sections happens to carry a little fin-like projecting portion, such portion in passing the bull nose 12 or 14 is so bent, formed or distorted as not to interfere with the fitting of the pipe section into position; and finally when one of these pipe sections is seated and further force applied, the seating of the pipe section is rendered perfect by such mutual yielding as may be necessary for this purpose, as between the pipe section and the pipe sleeve.

In the form of pipe sleeve shown in Figure 3 the inner band is shown at 22, the connecting portion'of annular form at 23, and at 24 and 25 are the upper and lower portions-of the outer band. The inner band 22 is provided with. bull noses 26 and 27, the outer band being similarly provided with noses 28 and 29.

The essential diiference between this form shown' at 30. Integral with it are the upper and lower portions 31 and 32 of the outer band, and also the upper and lower portions 33 and 34 of the inner band. The bull noses of the outer band are shown at 35 and 36, and the bull noses of the inner band are shown at 37 and 38.

I find in practice that if in driving the pipe substantially as above described 1t 'happens that either the outer band or the 1nner band of the pipe sleeve is forced agalnst a hard'rock or the like, the portion of the band engaging the rock may be sometimes broken; and that when this occurs the damaged pipe sleeve has a tendency to still hold itself together and to maintain the parts in position, if the pipe sleeve has the form shown 1n Figure 4.

However, the precise form for the pipe sleeve may be to some extent controlled by the nature of the work and the conditions of operation peculiar to a given locality or to the character of the particular undertaking.

I do not limit myself to the precise mechanism shown, as variations may be made therein without departing from my invention, the scope of which is commensurate with my claim.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is as follows:

The combination of apipe sleeve made of metal and provided with an outer band, an inner band concentric thereto and a connecting portion integral with said outer band and with said inner band and extending therebetween, and a pair of pipe sections made of metal and disposed upon opposite sides of said connecting portion and fitting tightly thereagainst, and against said inner and outer bands, the ends of said pipe sections, where they abut against said connecting portion, being swaged to make a tight fit as against said outer band and said inner band.

Signed at New York city, in the county of New York and State of New York, this 23rd 'day of March, 1928.

FRANCIS ,DE GARAY. 

